<template>
  <el-container class="home-container">
    <!-- 头部区域 start-->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>停车场后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 头部区域 end-->
    <el-container>
      <!-- 左侧菜单区域 start -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <template slot="title">
              <i :class="iconsObj[item.id] + ''"></i>
              <span>{{item.authName}}</span>
            </template>
            <el-menu-item :index="'/' + info.path" v-for="info in item.children"
            :key="info.id" @click="saveNavState('/' + info.path)">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{info.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 左侧菜单区域 end -->
      <!-- 中间菜单区域 start -->
      <el-main>
        <router-view></router-view>
      </el-main>
      <!-- 中间菜单区域 end -->
    </el-container>
  </el-container>
</template>
<script>
export default {
  data() {
      return {
          // 左侧菜单数据
          menulist: [],
          iconsObj: {
            125: 'iconfont icon-user',
            103: 'iconfont icon-tijikongjian',
            101: 'iconfont icon-shangpin',
            102: 'iconfont icon-danju',
            145: 'iconfont icon-baobiao'
          },
          isCollapse: false,
          activePath: ''
      }
  },
  created() {
    this.getMenuList()
    this.getNavState()
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(this.menulist)
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    },
    getNavState() {
      this.activePath = window.sessionStorage.getItem('activePath')
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  display: flex;
  background-color: #373d41;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
